Avian Point-Count/Callback Survey Protocol (revised May 2015) Summary of the Standardized North American Marsh Bird Monitoring Protocols

Transcription

1 SUPPLEMENTAL MATERIAL APPENDIX A Objectives: Avian Point-Count/Callback Survey Protocol (revised May 2015) Summary of the Standardized North American Marsh Bird Monitoring Protocols Modified From Courtney Conway Wildlife Research Report # Determine distribution of marsh birds within an area. 2. Estimate / compare density of marsh birds among management units, wetlands, or regions. 3. Estimate population trend for marsh birds at local or regional scale. 4. Evaluate incidental effects of management actions on marsh birds. 5. Document habitat types / conditions that may influence marsh bird abundance or occupancy. Survey Overview: Each survey consists of a 5-minute passive period point count and a broadcast sequence where all birds seen and/or heard using habitat are recorded. The passive period is followed by a broadcasting of a series of secretive marsh birds calls, in which a 30- second call is broadcast into the marsh, followed by a 30-second window of silence. This broadcast process is repeated for each secretive marsh bird species included on the broadcast sequence. Broadcast sequences vary by area (Table A.1). Required Equipment: Binoculars, data sheet, mp3 player and speaker, clip board, GPS, compass, pencil, & extra batteries General Survey Guidelines: One survey (consisting of both a passive period and series of broadcast calls) should be conducted within each survey period: o May 1 May 31 (exceptions: Virginia portion of Regions 7, 8 start April 15; Region 1, May 15 June 15) o June 1 June 25 (exceptions: Region 1, June 16 July 5) o June 26 July 15 (exceptions: Region 1, July 6 July 31)

2 Surveys should be conducted in the morning, starting 30 minutes before sunrise and ending between 1000 and 1100 hours. Once a survey has begun, the observer should remain next to the mp3 player and speakers until the survey has ended. Observers should change the direction in which they are facing several times during both the passive and broadcast periods to ensure detection of the maximum possible number of birds. Observers should stand 2 meters to one side of the speakers to avoid detection interference. Speakers should face the same direction, be positioned toward the center of the marsh, and should not be moved during the survey. Please note the direction of the speakers so that future observers can remain consistent. Surveys should be conducted when wind speed is <20 km/hr (12 mph) and not during sustained rain or heavy fog. Cell phones and other devices with an audible notification should be turned to off or vibrate during the survey period. Conduct surveys in the same chronology when possible. There should be a minimum of ten days between surveys at each point. Table A.1. Marsh bird broadcast sequences for bird sampling during the breeding season, , by subregion (north to south; see Figure 1 for state abbreviations). Species appear in the order they are played; species 4-letter codes: BLRA Black Rail, LEBI Least Bittern, SORA Sora, VIRA Virginia Rail, KIRA King Rail, CLRA Clapper Rail, AMBI American Bittern, COMO Common Moorhen, and SOSP Song Sparrow. Subregion State(s) Passive point count + call-broadcast 1 Coastal Maine ME 5 min + LEBI-VIRA-CLRA 2 Cape Cod - Casco Bay ME/NH/MA 5 min + BLRA-LEBI-SORA-VIRA-CLRA 3 Southern New England MA/RI/CT/NY 5 min + BLRA-LEBI-SORA-VIRA-KIRA-CLRA-COMO 4 Long Island NY 5 min + BLRA-LEBI-SORA-VIRA-KIRA-CLRA-COMO 5 Coastal New Jersey NY/NJ 5 min + BLRA-LEBI-SORA-VIRA-KIRA-CLRA-AMBI-COMO 6 Delaware Bay NJ/DE 5 min + BLRA-LEBI-SORA-VIRA-KIRA-CLRA-AMBI-COMO 7 Coastal Delmarva DE/MD/VA 5 min + BLRA-LEBI-VIRA-KIRA-CLRA-COMO-SOSP 8 Eastern Chesapeake Bay MD/VA 5 min + BLRA-LEBI-VIRA-KIRA-CLRA-COMO-SOSP

3 The Survey When you arrive at a point: 1. Record basic survey information: 1) Record the date in the format of the example provided; circle the appropriate state, region, visit number, and survey window; and record the hexagon and point id. 2) For main observer, record the person who surveyed the birds. Additional observers are those who recorded the data, but did not survey the birds. 2. Record survey conditions: 1) Circle the tide and stage of tide using the following guidelines: High - within 1 hr of high tide High/Falling - >1 hr after high tide, but less than half of the tidal cycle from high tide Low/Falling - >1 hr before low tide, but less than half of the tidal cycle from low tide Low - within 1 hr of low tide Low/Rising - >1 hr after low tide, but less than half of the tidal cycle from low tide High/Rising - >1 hr before high tide, but less than half of the tidal cycle from high tide 2) Record how the survey was conducted. It is important to record type of boat used for a survey because it may affect vocalization probability. Use the following guidelines: Foot survey conducted while standing on the ground Boat survey conducted while standing in a motorized boat, engine off Kayak survey conducted while standing in a kayak/canoe Boat/foot survey conducted while standing on the ground, but motorized boat is <100m away Kayak/foot survey conducted while standing on the ground, but kayak/canoe is <100m away Vehicle survey conducted while standing immediately next to a vehicle, on the road 3) Record ambient temperature using a thermometer, background noise (see codes), wind speed (see Beaufort numbers), wind direction, and sky condition (see U.S. Weather Bureau codes). Record these in the first row of the data sheet these measurements do NOT need to be repeated for each bird detected. Background Noise Codes 0 no noise 1 faint noise 2 moderate noise (probably can not hear birds beyond 100m) 3 loud noise (probably can not hear birds beyond 50m)

4 4 intense noise (probably can not hear birds beyond 25m) Wind Speed Codes (use Beaufort Number on Data Sheet) Beaufort Number Wind speed indicators Wind Speed mph / kmph 0 Smoke rises vertically < 1 / < 2 1 Wind direction shown by smoke drift 1-3 / Wind felt on face; leaves rustle 4-7 / 6-12 Leaves, small twigs in constant motion; 3 light flag extended 8-12 / Raises dust and loose paper; small branches are moved / Small trees in leaf sway; crested waves lets on inland waters / Sky Condition Codes U.S. Weather Bureau Codes 0 Clear or a few clouds 1 Partly cloudy (scattered) or variable sky 2 Cloudy (broken) or overcast 4 Fog or smoke 5 Drizzle 7 Snow 8 Showers 3. Begin bird survey: 1) Turn on speakers. 2) Press play on the mp3 player, making sure to check the mp3 file is playing from the beginning. Record Start Time as the time you pressed the start button of the mp3 player. The mp3 file includes a 5-minute passive period followed by a series of primary species broadcast calls, with 30 seconds of broadcasted vocalizations followed by 30 seconds of silence for each species. Each minute in the passive period is marked with a Minute 1, Minute 2, etc., vocal cue from a woman s voice on the mp3 file. This eliminates the need to look at a watch during the survey. There are corresponding columns on the data sheet for each time interval in the passive period as well as each broadcast call. 3) For the duration of the mp3 file, record any bird that you see and/or hear using the marsh and the immediate terrestrial edge habitat, as well as the number of individuals of each species. This includes any bird actively foraging from the air, observed on vegetation or on the ground, or birds swooping at you. Do NOT record

5 fly-overs of birds not using the habitat. This sometimes boils down to a judgment call on behalf of the observer. Bird detections are recorded on the data sheet differently for Primary Species and Secondary Species. A list of both sets of species can be found at the end of this protocol. This species division is NOT the same as SHARP focal/non-focal species, so be sure to understand the difference! Follow the following protocol for each type of species: a. Primary Species Each time a Primary Species individual is detected, record the 4-letter code for that species in a new line on the data sheet. Mark an X in the appropriate distance band. Mark an X in the column for each time interval in which the individual is detected. When a Primary Species is detected, additional information is collected about the first detection of each individual. The columns for these data are located at the far right side of the data sheet. In the Call Type column record the type of call heard. A description of these calls can be found at: Finally, estimate the exact distance in meters between you and the detected bird and record this in the Distance column. Example: If a Virginia Rail was heard 75 meters away doing the kicker call during the BLRA call sequence, the observer would record VIRA in the Species column, an X in the column, an X in the BLRA column, kicker in the Call Type column, and 75 in the Distance column. If the same individual VIRA calls during the CLRA vocalization and then flew, then record an X in the CLRA column on the same line. If the bird called constantly throughout the survey, all columns would have an X. If an unknown species is detected, write unknown in the Species column and take notes regarding the vocalization. If too many individuals of a species are calling at once, estimate the number and note the number is an estimate in the Comments column. Record any ancillary information that may have influenced bird detection in the Comments column. b. Secondary Species Each time a Secondary Species is detected, record the 4- letter code in the Species column, along with how many birds of that species were present. Mark an X in the appropriate distance band column. Each species should be listed on a separate line on the data sheet. Within each species, individuals detected in different distance bands are recorded on different rows.

6 Example: If a Seaside Sparrow was seen/heard 70 meters away during minute 2, record SESP in the Species column, an X in the column, and a tic mark or a dot in the Min 2 column. If additional Seaside Sparrow individuals are detected within m, record the number of individuals on the same row in the appropriate Responded During column(s). If a Seaside Sparrow is detected 0 50m or 100+m away, record the data in a new row. Only record the first time a Secondary Species is detected. This is different from how Primary Species detections are recorded. The Call Type, Direction, and Distance (meters) columns are not used for Secondary Species detections. Primary Species and 4-letter AOU codes: Each individual of the following species gets recorded on a separate line on the data sheet SORA - Sora VIRA - Virginia rail CLRA - Clapper rail KIRA - King rail BLRA - Black rail YERA - Yellow rail AMCO - American coot COMO - Common moorhen (Common gallinule) PUGA - Purple gallinule LIMP - Limpkin PBGR - Pied-billed grebe AMBI - American bittern LEBI - Least bittern Secondary Species: All species observed utilizing tidal marsh or the immediate terrestrial border of the marsh that are not on the primary species list are considered secondary species.

7 SHARP Point-Count/Callback Survey Data Sheet Date (e.g. 10-May-12): Region: 1 Coastal Maine Hexagon : Main Observer: Add'l Observer(s): Survey Point ID(s) : Tide (circle one): (High) (High/Rising) (High/Falling) State: ME Survey method (if by boat, include type): (Low) (Low/Rising) (Low/Falling) Visit Number : Survey Window (circle one) : 1 (May 15 - June 15) 2 (June 16 - July 5) 3 (July 6 - July 31) Page of Point ID Start Time (military) Temp (F) Sky Wind (Beaufort) Background noise Species Code Distance Band >100m m 0-50m Min 1 Min 2 Min 3 Responded During Min 4 Min 5 Min 6 (LEBI) Min 7 (VIRA) Min 8 (CLRA) Outside survey period Call Type(s) Distance (meters) Comments Sky: 0 clear or a few clouds, 1 partly cloud or variable sky, 2 cloudy or overcast, 4 fog or smoke, 5 drizzle, 7 snow, 8 showers Wind - Beaufort scale: 0 smoke rises vertically, 1 wind direction shown by smoke drift, 2 wind felt on face; leaves rustle 3 leaves, small twigs in constant motion; light flag extended, 4 raises dust and loose paper; small branches are moved, 5 small trees with leaves sway; crested wavelets on inland waters Background noise: 0 no noise, 1 faint noise, 2 moderate noise (probably can't hear some birds beyond 100m), 3 loud noise (probably can't hear some birds beyond 50m), 4 intense noise (probably can't hear some birds beyond 25m)

8 SHARP Point-Count/Callback Survey Data Sheet Page of Date (e.g. 10-May-12): Region (circle one): 2 Cape Cod - Casco Bay Hexagon : Main Observer: Add'l Observer(s): Survey Point ID(s) : Tide (circle one): (High) (High/Rising) (High/Falling) State (circle one): ME NH MA Survey method (if by boat, include type): (Low) (Low/Rising) (Low/Falling) Visit Number (circle one) : Survey Window (circle one) : 1 (May 1 - May 31) 2 (June 1 - June 25) 3 (June 26 - July 15) Point ID Start Time (military) Temp (F) Sky Wind (Beaufort) Background noise Species Code Distance Band >100m m 0-50m Min 1 Min 2 Min 3 Responded During Min 4 Min 5 Min 6 (BLRA) Min 7 (LEBI) Min 8 (SORA) Min 9 (VIRA) Min 10 (CLRA) Outside survey period Call Type(s) Distance (meters) Comments Sky: 0 clear or a few clouds, 1 partly cloud or variable sky, 2 cloudy or overcast, 4 fog or smoke, 5 drizzle, 7 snow, 8 showers Wind - Beaufort scale: 0 smoke rises vertically, 1 wind direction shown by smoke drift, 2 wind felt on face; leaves rustle 3 leaves, small twigs in constant motion; light flag extended, 4 raises dust and loose paper; small branches are moved, 5 small trees with leaves sway; crested wavelets on inland waters Background noise: 0 no noise, 1 faint noise, 2 moderate noise (probably can't hear some birds beyond 100m), 3 loud noise (probably can't hear some birds beyond 50m), 4 intense noise (probably can't hear some birds beyond 25m)

9 SHARP Point-Count/Callback Survey Data Sheet Date (e.g. 10-May-12): Region (circle): 3 Southern New England / 4 Long Island Hexagon : Main Observer: Add'l Observer(s): Survey Point ID(s) : Tide (circle one): (High) (High/Rising) (High/Falling) State (circle one): MA RI CT NY Survey method (if by boat, include type): (Low) (Low/Rising) (Low/Falling) Visit Number (circle one) : Survey Window (circle one) : 1 (May 1 - May 31) 2 (June 1 - June 25) 3 (June 26 - July 15) Page of Point ID Start Time (military) Temp (F) Sky Wind (Beaufort) Background noise Species Code Distance Band >100m m 0-50m Min 1 Min 2 Min 3 Min 4 Responded During Min 5 Min 6 (BLRA) Min 7 (LEBI) Min 8 (SORA) Min 9 (VIRA) Min 10 (KIRA) Min 11 (CLRA) Min 12 (COMO) Outside survey period Call Type(s) Distance (meters) Comments Sky: 0 clear or a few clouds, 1 partly cloud or variable sky, 2 cloudy or overcast, 4 fog or smoke, 5 drizzle, 7 snow, 8 showers Wind - Beaufort scale: 0 smoke rises vertically, 1 wind direction shown by smoke drift, 2 wind felt on face; leaves rustle 3 leaves, small twigs in constant motion; light flag extended, 4 raises dust and loose paper; small branches are moved, 5 small trees with leaves sway; crested wavelets on inland waters Background noise: 0 no noise, 1 faint noise, 2 moderate noise (probably can't hear some birds beyond 100m), 3 loud noise (probably can't hear some birds beyond 50m), 4 intense noise (probably can't hear some birds beyond 25m)

10 SHARP Point-Count/Callback Survey Data Sheet Page of Date (e.g. 10-May-12): Region (circle): 5 Coastal New Jersey / 6 Delaware Bay Hexagon : Main Observer: Add'l Observer(s): Survey Point ID(s) : Tide (circle one): (High) (High/Rising) (High/Falling) State (circle one): NY NJ DE Survey method (if by boat, include type): (Low) (Low/Rising) (Low/Falling) Visit Number (circle one) : Survey Window (circle one) : 1 (May 1 - May 31) 2 (June 1 - June 25) 3 (June 26 - July 15) Point ID Start Time (military) Temp (F) Sky Wind (Beaufort) Background noise Species Code Distance Band >100m m 0-50m Min 1 Min 2 Min 3 Min 4 Min 5 Responded During Min 6 (BLRA) Min 7 (LEBI) Min 8 (SORA) Min 9 (VIRA) Min 10 (KIRA) Min 11 (CLRA) Min 12 (AMBI) Min 13 (COMO) Outside survey period Call Type(s) Distance (meters) Location Notes Comments Sky: 0 clear or a few clouds, 1 partly cloud or variable sky, 2 cloudy or overcast, 4 fog or smoke, 5 drizzle, 7 snow, 8 showers Wind - Beaufort scale: 0 smoke rises vertically, 1 wind direction shown by smoke drift, 2 wind felt on face; leaves rustle 3 leaves, small twigs in constant motion; light flag extended, 4 raises dust and loose paper; small branches are moved, 5 small trees with leaves sway; crested wavelets on inland waters Background noise: 0 no noise, 1 faint noise, 2 moderate noise (probably can't hear some birds beyond 100m), 3 loud noise (probably can't hear some birds beyond 50m), 4 intense noise (probably can't hear some birds beyond 25m)

11 SHARP Point-Count/Callback Survey Data Sheet Date (e.g. 10-May-12): Region (circle): 7 Coastal Delmarva / 8 East. Chesapeake Bay Hexagon : Main Observer: Add'l Observer(s): Survey Point ID(s) : Tide (circle one): (High) (High/Rising) (High/Falling) State (circle one): DE MD VA Survey method (if by boat, include type): (Low) (Low/Rising) (Low/Falling) Visit Number (circle one) : Survey Window (circle one) : 1 (April 15 - May 31) 2 (June 1 - June 25) 3 (June 26 - July 15) Page of Point ID Start Time (military) Temp (F) Sky Wind (Beaufort) Background noise Species Distance Band >100m m 0-50m Min 1 Min 2 Min 3 Min 4 Responded During Min 5 Min 6 (BLRA) Min 7 (LEBI) Min 8 (VIRA) Min 9 (KIRA) Min 10 (CLRA) Min 11 (COMO) Min 12 (SOSP) Outside survey period Call Type(s) Distance (meters) Location Notes Comments Sky: 0 clear or a few clouds, 1 partly cloud or variable sky, 2 cloudy or overcast, 4 fog or smoke, 5 drizzle, 7 snow, 8 showers Wind - Beaufort scale: 0 smoke rises vertically, 1 wind direction shown by smoke drift, 2 wind felt on face; leaves rustle 3 leaves, small twigs in constant motion; light flag extended, 4 raises dust and loose paper; small branches are moved, 5 small trees with leaves sway; crested wavelets on inland waters Background noise: 0 no noise, 1 faint noise, 2 moderate noise (probably can't hear some birds beyond 100m), 3 loud noise (probably can't hear some birds beyond 50m), 4 intense noise (probably can't hear some birds beyond 25m)